Radiator core



pri 1931- H. P. YEAGER 1,800,353

RADIATOR CORE Filed March 14, 1930 3 Sheets-Sheet 1 Aprfl 14,. 1931.YEAGER 1,800,853

RADIATOR CORE Filed March 14, 1930 3 Sheets-Sheet 2 April 14, 1931. H.P. YEAGER 1,800,853

RADIATOR CORE Filed March 14, 1930 s Sheets-Sheet 5 atented Ar. 14, l93l1?. WEN F BUFFALO, NEW YORK, ASSIGNOR I0 FEIDDERS MANUFACTUR- 1N t'i-HUM'EANY, ENG, 0F BUFFALO, NEW YORK,*A CORPORATION OF NEW YO IA'I'OECORE Application filed March it, 1930. Serial No. 435,692.

This invention relates to a core commonly storming part of radiatorssuch as are commonly employed in the cooling systems of gas engines usedfor operating automobiles,

aeroplanes and similar installations.

The object of this invention is to provide a core oi this character inwhich the air while passing through the core is diverted from a straightcourse by ballie means so as ll to take a serpentine or zig-zag courseand thereby produce a turbulent action of the same which causes anincreased transfer of heat to the air from the water in the core i w"and the eficiency of the radiator is improved. M in the accompanyingdrawings:

till

Figure 1 is a fragmentary front elevation of a radiator coreembodying'my invention. Figure 2 is a top plan view of the same.

Figures 3 and 4 are horizontal sections on the correspondingly numberedlines in Fig. 1.

Figure 5 is a vertical section taken on line 5-5, Fig. 2.

Figure 6 is a perspective view of one of the radiating fins constructedin accordance with my improvements.

Figure 7 is a similar view showing two water tube walls assembled foruse in connection with radiating fins containing my invention.

Figure 8 is a fragmentary front elevation of a radiator core containinga pair of radiating fins between adjacent water tubes instead of onlyone fin between adjacent tubes as shown in Figs.-1-5.- l FigureQ is avertical section of the core.

shown in Fig. 8. V

Figure 10 is a perspective view of one of the radiating fins employedinthe construe-j tion of the core shown in Figs. 8 and 9.

actors of reference indicate like parts in the several figures of thedrawings. i

Referrlng to Figs. 1-3, the numeral 10 repthe present case are arrangedgenerally in an upright position and adapted to receive- .Inthefollowing description similar charresentsa plurality of water tubeswhich in tween two opposing strips or sheets of metal which arecorrugated so that the water passage between the same is of zig-zagform. The central parts of these strips are imperiorate and constitutethe side walls 12 of the water tube and the opposite vertical edges ofthe strips are offset relative to the side walls forming flanges 13which are secured to each other by soldering, or the like, and thgrebyconstitute the end walls of the water tu e.

The summits 14 of the corrugated wall strips at the offset flanges 13thereof arepref- 'erably flat, but the summits 15 of the corrugations onthe exterior of the side walls of each Water tube strip are of convex orsalient form between the respective flanges.

The spaces between the several water tubes are divided by theradiatingfins into a plurality of horizontally extending air passagesthe number of such fins in each space between adjacent water tubes beingdetermined by varying requirements and conditions, one of these fins 16being employed in each space between-adjacent water tubes in theconstruction shown in Figs. 1-5.

Each of these fins consists of a corrugated strip of sheet metal thesummits. ofwhich are provided at opposite longitudinal edges er; thestrip with flat faces 17 which engage vwith flat faces 14: on thesummits of the adja'cent flanges at opposite edges of the respectivewater tube strips, and intermediate of, v

the opposite longitudinal edges of each fin" strip each of its summitsis provided with a longitudinal concave seat or groove 19 whichisadapted to be engaged by the convex longitudinal summit 15 on theintermediate parts or side walls of the adjacent water tube strips,thereby interlocking said radiating fin strip and the respective watertube strips and holding the same against horizontal and verticaldisplacement relative to each other.

Heretofore the air passed through the air passage in the form ofstraight stream which causes only a moderate engagement of the same withthe radiating fins and tube walls and consequently only a moderatetransference of heat from the hot water to the air. To increase thisheat transference the air in the present construction is caused to passback and forth through each slope 21 of the radiating fins and alsostrike the tube walls at an angle so that the air passes through the airpassages in the form of serpentine streams and also rebounds from thetube walls so that the air is agitated or converted into a turbulentcondition, whereby the progress of the same through the air passages isimpeded and all parts of the same are brought into more intimate contactwith the metal of the radiating fins and the water tube wall, therebyincreasing the cooling efficiency of the core for a given amount ofmetal accordingly.

This zig-zag course and turbulent condition of the air is perferablyefiected by providing each slope of each radiating fin with a pluralityof scoop shaped bafiies 20 which project laterally from the respectiveslope. Each of these bafiies has a wide mouth-'23 opening lengthwise ofthe respective slope and inclined from this mouth toward its base wherethe scoop shaped bafile connects with said slope. Each of these bafflesis preferably formed by making a slit vertically in the respective finstrip or transversely of the path of the air stream and deflecting themetal of the strip on one side of the slit laterally into the form of ascoop, as shown in Figs. 1-6.

In the preferred construction the scoop shaped baflles in each slope ofa fin strip are arranged partly on one side of this slope and partly onthe opposite side of the same, and the scoops on one side of this slopealternate with the scoop on the other side thereof. Due to thisconstruction the air in passing successively through a row of scoopbafiies 011 one slope of the radiating fin will take a zig-zag, orserpentine path through the core and thus come into more intimatecontact with the metal of the respective fin and thereby increase theheat transference from the water to the air accordingly. Furthermore, bycausing the air to pass back and forth through the slopes of the finsthe air is also caused to engage the walls of adjacent water .tubes atan angle and thereby further increase the heat transferring eflect.

If desired all the scoop shaped bafiies may have their inlets or mouthsfacing lengthwise in the same direction but it is preferable to face themouths of the baffles on some slopes lengthwise in one direction andface the mouths of the baflies on other slopes in the oppositedirection, as shown in Figs. 2, 3,

4 and 6. Insuch an organization these baflles which have theirmouthsfacing toward the oncoming stream of air in one air passage willintercept the air in the manner of a scoop and deflect the same throughthe opening 25 formed in the slope by the displacement of metalconstituting the respective scoop so that this air enters the passage onthe opposite side of the slope, then rebounds from the opposing watertube wall, and is then intercepted by the next following baffle scoopand again directed through the next following opening in the respectiveslope,

this passing from one side of each slope to the other being continueduntil the air escapes from the rear end of the respective air passage.

These scoop shaped bafiles which have their mouths facing away from theoncoming stream of air permit the air to be drawn by suction from oneside of the slope to the opposite side thereof through the openingsformed by deflecting the metal constituting these bafiies, so that thesame also cause air to move in the form of a serpentine stream throughthe core.

As aresult of this construction, the turbulence of the air stream isincreased, a greater water cooling efficiency is obtained, and a betterdistribution of the cooling effect of the air is obtained because theair is free to pass through the several radiating fins and thus balancethe air streams relative to each other.

When more than one radiating fin is employed in the space between twoadjacent water tubes, as for example, two fins 161 shown in Figs. 8 and9, those summits of the fins lying next to the water tubes are providedwith concave seats or grooves 28 which are engaged by the summits 15 ofthe corrugations of the water tube walls, but the summits of each ofthese fins which face the other companion fin arealternately of convexand concave form, as shown at 27, 29, and in assembling a pair of suchfins the convex summit 27 of one fin engages with a concave summit 29 ofthe companion fin, as shown in Fig. 9, therefore interlocking this pairof fins and holding the same against displacement relative to eachother.

I claim as my invention:

A radiator core having a plurality of water tubes and a plurality of airpassages arranged between said water tubes, each of said water tubeshaving opposed walls consisting of two corrugated strips of metal whichhave their opposite longitudinal edges offset to form flanges engagingone another and their intermediate parts spaced from each other, andsaid air passages being formed by fins consisting of corrugated stripsof metal arranged between adjacent water tubes, each of said fin stripshaving scoop-shaped bafiles on opposite sides of its 'slopes andextending lengthwise thereof, the baflies on one side of till newestsignature.

HARRY P. YEAGER.

